Problem in the purchase of the license with purchase in the app

Trying to buy the unlocker through the dedicated banner in the app opens the google pay window but the indicated google account is not the right one (I have 3 configured accounts).
I tried to uninstall the app and reinstall it with the primary account to be sure but I am always offered the purchase with the wrong account.
Is it possible to have support?
Thank you!

This is out of control of devs.

The only known workaround is the one documented in the Wiki, uninstall Yatse and install it from a web browser on a computer logged with correct account.

But be aware that Google Play Store might bug at any time and switch the account during application update.